[LeUsername]

PS: These safety parts looked almost as old as the elevator, so if they weren't a part of the original design, I would guess they were added a long time ago...

EDIT: I actually found a mention of regulation from 1982 stating that the sliding upper parts are mandatory both on the cabin and on the "door frame" and moving them must stop the elevator. The hinged floorboards on cabins and floors are also mandatory, but there is no mention that they should also stop the elevator. See [1] (in Czech) for pictures.

[1] http://paternoster.archii.cz/bezpecnost.html